Sushi One is a nice place to have a Sushi dinner or lunch. It belongs to a small chain of five Sushi restaurants in Hong Kong. The interior design is modern and very pleasant. The Sushi and Sashimi are fresh and the service is good. After 10PM you pay 50% less for all the Sushi and Sashimi menu. This is my favorite place when I stay in Royal Plaza hotel which is located in the same shopping mall above Mong Kok East station.